  #### CLASSIFICATION OF NUMBERS

Posted On :   17/06/2020||11:29:59pm

## “MATHEMATICS IS THE QUEEN OF ALL SCIENCES AND NUMBER THEORY IS THE QUEEN OF MATHEMATICS”—-GAUSS

1.various number systems

• natural numbers :-numbers 1,2,3,…….used for counting or counting numbers.

• zero:-0

• whole numbers:-0,1,2,3,……………….

• Negative integers:- -1,-2,-3,-4,……….

• Integers:- ……….-3,-2,-1,0,1,2,3……..

• fractions:- numbers in the form a/b(b is not equal to 0 or1).

• Real numbers:-numbers which can represented on areal line.

• Imaginary number:-Pi;where p is real number and i=square root of 1

• complex numbers:-numbers in the form a+bi where a and b are reals and i=square root of 1r:-.

• prime numbers:- The number which can be divided evenly only by 1 or itself. And it must be a whole number greater than 1.

• composite numbers:-A non zero integer which is either a unit nor a prime is called a composite number.

• Even numbers:-0,+/-2,+/-4,……..

• Odd numbers:-+/-1,+/-3,+/-5,…….

• Natural numbers:-1,2,3,4,………….